Let's Start With Reality

Despite our deepening understanding of our universe, it's Big Bang, and the laws of physics set at the moment it began, we are still left having to deal with Aristotle's unmoved mover. 

Who or what caused the big bang? If the big bang represents the other side of a black hole - where did the black hole come from?

If we live in a multiverse how did it get started? Who or what started it?

If it's a multiverse within a multiverse - well you get the idea. 

I've noticed that when using the scientific method if you go down a pathway that seems unanswerable it is almost always because your line of inquiry is defective. 

How did the universe begin I suspect is the wrong question. It implies a linearity to time that may not exist. The question itself describes an interpretation of reality that may not actually exist.